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Title: Developmental expression of pancreatic gastrin and somatostatin in the sheep.
Austin Authors: Read, M A;Shulkes, Arthur
Affiliation: Department of Surgery, University of Melbourne, Austin Hospital, Victoria, Australia
Issue Date: 1-May-1993
Publication information: Molecular and Cellular Endocrinology; 93(1): 31-8
Abstract: The nature and developmental profile of pancreatic gastrin and somatostatin were determined in the ovine fetus, a model considered relevant to human development. Gastrin and somatostatin peptide and mRNA were examined in the pancreas of fetal sheep at 80, 105, 125 and 140 days gestation (term: 145 days), 15-day-old lambs and adult sheep. Highest concentrations of gastrin (both amidated and the glycine-extended precursor) were observed in the lamb pancreas with gastrin mRNA levels highest at 140 days gestation. Amidated gastrin was present almost entirely as sulphated gastrin-17 while glycine-extended gastrin was mostly present as a high molecular weight form. Only glycine-extended gastrin was detected in the adult pancreas, indicating attenuated processing in mature adult pancreas. Up to 140 days gestation, gastrin mRNA correlated better with glycine-extended gastrin than with the amidated form, suggesting that amidation was a rate-limiting factor in the production of bioactive gastrin. Somatostatin mRNA and peptide reached a higher concentration and peaked before that of gastrin. Gastrin is a normal product of the fetal and adult pancreas although, when compared to the antrum, the levels are low and the processing to amidated forms is substantially reduced. Unlike in the stomach, the developmental profile of pancreatic gastrin and somatostatin does not appear to be linked.
Gov't Doc #: 8100542
Type: Journal Article
Subjects: Amino Acid Sequence
Base Sequence
Gene Expression Regulation
Gestational Age
Molecular Sequence Data
Pancreas.embryology.growth & development.metabolism
Protein Precursors.immunology
Protein Processing, Post-Translational
RNA, Messenger.genetics
Sheep.embryology.growth & development.metabolism
Appears in Collections:Journal articles

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